Basically, if Izturis can play good defense like he has previously in his career, he'll be fine. Defense is really the only requirement for a backup SS. It's not like whoever the backup SS is will be getting a ton of pinch-hitting opportunities. Those will go to Conrad/Green, Kottaras, and Aoki. And Morgan when he's coming off the bench. Izturis will essentially only play on days when Gonzalez needs to rest, or as the last man of the bench in rare situations. Melvin is likely looking around for a possible upgrade, but I honestly don't think he'll go out of his way to make it happen. And by going out of his way, I mean trading anything besides a low-level or paying someone like Theriot when already over budget. He'll just go with Izturis, and look for a possible upgrade at the deadline if it's not working out.